University of Oslo - Division of Emergencies and Critical Care, University of Oslo - Department of Research Support for Clinical Trials, University of Oslo - Oslo University Hospital, University of Oslo - Division of Emergencies and Critical Care, University of Oslo - Department of Immunology and Transfusion Medicine, University of Oslo - Institute of Clinical Medicine, University of Oslo - Institute of Clinical Medicine, Vestre Viken Hospital Trust, Diakonhjemmet Hospital, Sørlandet Hospital, Innlandet Hospital, University Hospital North Norway, University of Stavanger - Stavanger University Hospital, University of Oslo - Institute of Clinical Medicine, Vestre Viken Hospital Trust, University of Oslo - Division of Emergencies and Critical Care, University of Oslo - Oslo University Hospital, District General Hospital of Førde - Section for Rheumatology, Haugesund Hospital, Vestre Viken Hospital Trust, Vestre Viken Hospital Trust, Møre og Romsdal Hospital Trust, Telemark Hospital Trust, Haraldsplass Deaconess Hospital, Sørlandet Hospital, Møre & Romsdal Hospital Trust - Molde Hospital - 8Department of Internal Medicine, Innlandet Hospital Trust, Nord-Trøndelag Hospital Trust, University of Oslo - Department of Immunology and Transfusion Medicine, University of Oslo - Institute of Clinical Medicine, University of Oslo - Department of Immunology and Transfusion Medicine, Trondheim University Hospital, Akershus University Hospital - Department of Infectious Diseases, Lovisenberg Diaconal Hospital - Department of Medicine, University of Oslo - Institute of Clinical Medicine, University of Bergen - Department of Clinical Science, Østfold Hospital Kalnes - Department of Infectious Diseases, University of Oslo - Oslo University Hospital, University of Oslo - Institute of Clinical Medicine, University of Oslo - Institute of Clinical Medicine, University of Oslo - Institute of Clinical Medicine, University of Oslo - Section for Clinical Immunology and Infectious Diseases and University of Oslo - Institute of Clinical Medicine